Per the article, “…. However, neither have confirmed how many people are actively using the service which might suggest that the figure is considerably lower than the 100 million mark.”
“Signing up to Threads is of course extremely simple if you already have an Instagram account, something that could have helped the Twitter competitor reach such a high number in such a short period of time.”
In other words, you are automatically signed up for Threads if you have a current Instagram account…
With that being said, nowhere in the article does it warn users of the service’s horrendous privacy policy. Instead, we are “given the impression” that millions have left Twitter to sign up for threads in very quick fashion.